Tag: physics

Questions Related to physics

With the length of vocal chord, voice quality

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. changes

  2. remains same

  3. may or may not change

  4. remains same but loudness changes

Show answer
Correct Option: A
Explanation:

The voice quality changes as per the length of the vocal chords. Men have about 20 mm long vocal chords, whereas women have about 15 mm long vocal chords. Children have very short vocal chords. That attributes to the different voices of men, women and children.

Fill in the blank.

The length of the vocal chords in men and women is approximately _____ and _____ respectively.

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. 15 mm, 20 mm

  2. 20 mm, 30 mm

  3. 20 mm, 15 mm

  4. 25 mm, 15 mm

Show answer
Correct Option: C
Explanation:

The length of the vocal chords differs in men and women, which is why there is difference in the quality of their voice. The length of the vocal chord in men is approximately 20 mm and in women it is 15 mm.

How does sound is produced by humans?

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. In humans sound is produced by the voice box.

  2. In humans sound is produced by the larynx.

  3. In humans sound is produced by the upper part of the wind pipe.

  4. All

Show answer
Correct Option: D
Explanation:

In humans sound is produced by the voice box or larynx. It is the upper part of the windpipe. Two vocal cords are stretched across the voice box leaving a narrow slit. When the lungs force air through the slit, it vibrates and produces sound.

Which body part is useful to make basic sound of the voice in humans?

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. Vocal folds in larynx

  2. Lungs

  3. Wind pipe

  4. Throat

Show answer
Correct Option: A
Explanation:

Humans have larynx which consists of vocal folds which helps in producing sound which we call voice.

What is the process, of converting the air pressure from lungs into audible vibrations, called?

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. Excitation

  2. Vibration

  3. Phonation

  4. None

Show answer
Correct Option: C
Explanation:

Phonation is known as process of converting air pressure from lungs into audible vibrations.

The physical quantity which oscillates in most waves is:

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. Mass

  2. Energy

  3. Amplitude

  4. Wavelength

Show answer
Correct Option: C
Explanation:

Mass of a particle executing a vibration in a wave is constant. The energy and wavelength in a wave in the same medium remain constant. Amplitude of the wave varies with time although the peak value of  the amplitude is constant.

How many vocal cords does a person have?

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. 3

  2. 1

  3. 2

  4. 5

Show answer
Correct Option: C
Explanation:

There are 2 vocal cords, which produce sound in humans. There are, in fact, 2 other cords but they do not contribute in producing voice. Those are silent vocal cords.

What is the average adult female speaking voice range?

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. 125Hz

  2. 210Hz

  3. 300Hz

  4. 400Hz

Show answer
Correct Option: B
Explanation:

Average female speaking voice range is $210Hz$

Average male speaking voice range is $125Hz$

Average child speaking voice range is $ 300Hz$

Sound in human body is produced by

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. vocal cord

  2. Neck

  3. Heart

  4. Larynx

Show answer
Correct Option: A

The sound waves which cannot be heard by a human ear are called.

physics world of sounds sound produced by humans propagation of sound production and propagation of sound

  1. Ultrasonic sounds

  2. Infrasonic sounds

  3. Extraordinary sounds

  4. Both (a) and (c)

Show answer
Correct Option: D
Explanation:

Human ear has a hearing range of 20Hz to 20KHz.

Ultrasonic and Extraordinary sounds are out of this range but infrasonic sound is near to 20 Hz and can be heard by humans but with difficulty.